Guest guest Posted October 28, 2004 Report Share Posted October 28, 2004 Hi folks: Here is another method which gives a number for me that is quite close to the US Navy method: http://www.healthcentral.com/cooltools/CT_Fitness/bodyfat1.cfm Rodney. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 28, 2004 Report Share Posted October 28, 2004 According to this, I'm too fat at 110lbs and 5'4 " . It's telling me to lose anywhere from 10 to 14 lbs. Perhaps what they mean is that I should " replace " my " fat " with lean muscle mass? At my age I think my weight is pretty good. on 10/28/2004 8:53 AM, Rodney at perspect1111@... wrote: > > Hi folks: > > Here is another method which gives a number for me that is quite > close to the US Navy method: > > http://www.healthcentral.com/cooltools/CT_Fitness/bodyfat1.cfm > > Rodney. Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 28, 2004 Report Share Posted October 28, 2004 Sorry if I confused anyone. According to the calculations I have 27% bodyfat (unless I made a mistake somewhere) resulting in a recommendation by them that I lose about 10 lbs. Of course women are expected to have more fat than men, nevertheless I was surprised that according to them I was overweight at 110 lbs at 5'4 " (which is why perhaps I have too much fat mass compared to lean body mass). but I'm no expert. Perhaps I'll go through the calc again later today. on 10/28/2004 10:48 AM, citpeks at citpeks@... wrote: > >>>> > From: Francesca Skelton <fskelton@e...> > Date: Thu Oct 28, 2004 9:17 am > Subject: Re: [ ] Body Fat Percentage > According to this, I'm too fat at 110lbs and 5'4 " . It's telling me to > lose anywhere from 10 to 14 lbs. Perhaps what they mean is that I > should " replace " my " fat " with lean muscle mass? At my age I think my > weight is pretty good. > on 10/28/2004 8:53 AM, Rodney at perspect1111@y... wrote: >> http://www.healthcentral.com/cooltools/CT_Fitness/bodyfat1.cfm >>>> > > Francesca, > > I just tried the link and my were results consistent with the Navy > method. (13% body fat, 20 pounds of fat and 131 pounds of lean body > mass) > > If you only have 14 lb of fat in your 110 lb frame, that is only 12.7% > body fat, which is as close as you can get to the essential fat for a > woman. > > Tony > > > > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 28, 2004 Report Share Posted October 28, 2004 Hi : Here is an article, from what looks like a reputable website, that discusses the issue. Tony has tables which I have seen various places that specify expected healthy minimums for 'essential fat', 'athletes', and regular people, both for males and females. http://sportsmedicine.about.com/cs/body_comp/a/aa090200a.htm Also is it not true that if your body fat reserves get too low your body will start to burn for energy stuff you really would prefer to keep? Like muscle, including perhaps heart muscle? Possibly including the bone matrix tissue Tony has mentioned here a number of times? Rodney. > > > > > > > > > > > > > > > > > Hi folks: > > > > > > > > > > > > Here is another method which gives a number for me that is > > quite > > > > > > close to the US Navy method: > > > > > > > > > > > > http://www.healthcentral.com/cooltools/CT_Fitness/bodyfat1.cfm > > > > > > > > > > > > Rodney. > > > > > > > > > > > > > > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted October 28, 2004 Report Share Posted October 28, 2004 This time I came out at 21.7% bodyfat (a bit better). BTW here they explain the " accuracy " (or non-accuracy) of this test: http://www.healthcentral.com/cooltools/CT_Fitness/bodyfat1.cfm#accurate this time when used the questionairre: " how much should I weigh " it actually said: 110 pounds and that I should lose 0 pounds of fat. Whew. Must have measured wrong the first time on 10/28/2004 8:53 AM, Rodney at perspect1111@... wrote: > > Hi folks: > > Here is another method which gives a number for me that is quite > close to the US Navy method: > > http://www.healthcentral.com/cooltools/CT_Fitness/bodyfat1.cfm > > Rodney. > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 28, 2009 Report Share Posted February 28, 2009 Hello Rodney, I would not trust any conversion between BMI and body fat. Ronnie , who is Mr. Olympia, has a BMI of 41, but his body is pure muscle. Any formula that does not take into consideration skin thickness measurements or the circumference around several parts of the body cannot give you good results. Try the U.S. Navy Circumference Method. You only need a tape measure: http://www.scientificpsychic.com/fitness/diet.html With regard to 40%CR and body weight, I am starting to think that " being hungry " and not body weight or percent body fat is the key to longevity. How else can you explain that alternate day fasting seems to have all the benefits of CR, even though it does not result in great weight loss? Tony > > Hi folks: > > BF% is an interesting number, and I would like to get some idea what > mine is, without spending a fortune to find out. > > My impression is that, generally speaking, people in the CR community > seem to think that people with a BMI around 20 are likely to have a > BF% of about 10%. > > But when my BMI was 21 I had a hand-held impedence measurement taken > of my body fat and it came out at 23.7%. And now I see a paper (PMID > 2043597) - Deurenberg, Weststrate and Seidell - which has formulae > for converting BMI to BF%. If their formulae are correct, this > indicates that for the average adult male aged 70 a BMI of 20 would > be associated with a BF 24%. > > These numbers are dramatically different from what, it seems to me, > has been the accepted wisdom here. But I seem to recall Warren once > posting here that the 40% restricted mice that lived the absolute > longest were those that had managed to preserve the most body fat. > So, there may be a silver lining to this post! > > Any input? > > Rodney. > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 28, 2009 Report Share Posted February 28, 2009 Hi I agree with you that the relationship between BMI and BF in some individuals like Ronnie would not be a good marker.But, in reality, when you consider the health of our current population and their dietary intake, body weight and lack on activity, I am wondering what % of the population do you think are exceptions like that? How many people do you really think have high BMI's do to excess muscle?While I don't have a number, my guess is, it is a very small percentage of those with high BMI's.Also, high BMI with low BF, may still pose some additional health problems as lower BMIs, regardless of BF are associated with longevity.RegardsJeffOn Feb 27, 2009, at 10:43 PM, citpeks wrote:Hello Rodney,I would not trust any conversion between BMI and body fat. Ronnie, who is Mr. Olympia, has a BMI of 41, but his body is puremuscle. Any formula that does not take into consideration skinthickness measurements or the circumference around several parts ofthe body cannot give you good results.Try the U.S. Navy Circumference Method. You only need a tape measure:http://www.scientificpsychic.com/fitness/diet.htmlWith regard to 40%CR and body weight, I am starting to think that"being hungry" and not body weight or percent body fat is the key tolongevity. How else can you explain that alternate day fasting seemsto have all the benefits of CR, even though it does not result ingreat weight loss? Tony>> Hi folks:> > BF% is an interesting number, and I would like to get some idea what > mine is, without spending a fortune to find out.> > My impression is that, generally speaking, people in the CR community > seem to think that people with a BMI around 20 are likely to have a > BF% of about 10%.> > But when my BMI was 21 I had a hand-held impedence measurement taken > of my body fat and it came out at 23.7%. And now I see a paper (PMID > 2043597) - Deurenberg, Weststrate and Seidell - which has formulae > for converting BMI to BF%. If their formulae are correct, this > indicates that for the average adult male aged 70 a BMI of 20 would > be associated with a BF 24%.> > These numbers are dramatically different from what, it seems to me, > has been the accepted wisdom here. But I seem to recall Warren once > posting here that the 40% restricted mice that lived the absolute > longest were those that had managed to preserve the most body fat. > So, there may be a silver lining to this post!> > Any input?> > Rodney.> Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 1, 2009 Report Share Posted March 1, 2009 The impedance method is notoriously unreliable, since it varies with your hydration level. The water immersion test is better, and not all that expensive, if you can find someone to do it. From Wikipedia: The Bioelectrical impedance analysis (BIA) method is a more affordable but less accurate way to estimate body fat percentage. The general principle behind BIA: two conductors are attached to a person's body and a small electrical current is sent through the body. The resistance between the conductors will provide a measure of body fat, since the resistance to electricity varies between adipose, muscular and skeletal tissue. Fat-free mass (muscles) is a good conductor as it contains a large amount of water (approximately 73%) and electrolytes, while fat is anhydrous and a poor conductor of electrical current. Factors that affect the accuracy and precision of this method include instrumentation, subject factors, technician skill, and the prediction equation formulated to estimate the Fat Free Mass. Criticism of this methodology is based on where the conductors are placed on the body; typically they are placed on the feet, with the current sent up one leg, across the abdomen and down the other leg. As technician error is minor, factors such as eating, drinking and exercising must be controlled since hydration level is an important source of error in determining the flow of the electrical current to estimate body fat. As men and women store fat differently around the abdomen and thigh region, the results can be less accurate as a measure of total body fat percentage. Another variable that can affect the amount of body fat this test measures is the amount of liquid an individual has consumed before the test. As electricity travels more easily through water, a person who has consumed a large amount of water before the test will measure as a lower body fat percentage. Less water will increase the percentage of body fat. Bioelectrical impedance analysis is available in a laboratory, or for home use in the form of body fat scales and hand held body fat analyzers. > > I don't know why people are living longer, but I can tell you, we now have 5 centi's in a 23,000 pop. 100 yo Feb 19. That's 2 added this year. > > More than 25,154 died in U.S. 2008, 100 yo or older, and the number is increasing by +7.5 % annually. > The oldest born in 1868. LOLA J BROWN, NE. > There was a Lola Brown in the 1930 census, , NE. > > MY BF I measured for a while, and it was always 27%, by an impedance meter. I think maybe they're not reliable. > > Regards > > > [ ] Body Fat Percentage > > > Hi folks: > > BF% is an interesting number, and I would like to get some idea what > mine is, without spending a fortune to find out. > > My impression is that, generally speaking, people in the CR community > seem to think that people with a BMI around 20 are likely to have a > BF% of about 10%. > > But when my BMI was 21 I had a hand-held impedence measurement taken > of my body fat and it came out at 23.7%. And now I see a paper (PMID > 2043597) - Deurenberg, Weststrate and Seidell - which has formulae > for converting BMI to BF%. If their formulae are correct, this > indicates that for the average adult male aged 70 a BMI of 20 would > be associated with a BF 24%. > > These numbers are dramatically different from what, it seems to me, > has been the accepted wisdom here. But I seem to recall Warren once > posting here that the 40% restricted mice that lived the absolute > longest were those that had managed to preserve the most body fat. > So, there may be a silver lining to this post! > > Any input? > > Rodney. > Quote Link to comment Share on other sites More sharing options...
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